Dentist&#39;s clamp.



PATENTED AUG. 4,1903. SKA.

V. MALIZAN & JLG. PROOHA DENTISTS CLAMP.

APPLICATION PILBDAPR. 2, 1903.

N0 MODEL.

UNITED STATES Patented August 4, 1903.

VICTOR MALIZAN AND JERRY G. PROCHASKA, OF CHICAGO, ILLINOIS.

DENTISTS CLAM P.-

SEECIFIGATXQN forming part of Letters Patent No. 335,543, dated August4, 1903.

Application filed April 2, 1903' Serial No. 150,748. (No model.)

To all whom, it may concern.-

Be it known that we, VICTOR MALIZANand JERRY G. PROCHASKA, citizens ofthe United States, residing at Chicago, in the county of Cook and Stateof Illinois, have invented certain new and useful Improvements inDentists Clamps; and we do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothersskilled in the art to which'it appertains to make and use the same.

This invention relates to a novel construction in a dentists clamp forholding a rubber dam down upon a tooth and in contact with the gum whenit is desired to fill a cavity adjacent the gum, the object being toprovide a device of this character which can be readily adjusted to fitand be firmly secured to the tooth; and it consists in the features ofconstruction and combinations of parts hereinafter fully described andclaimed.

In the accompanying drawings, illustrating this invention, Figure 1 is aside elevation of a clamp constructed in accordance with our invention.Fig. 2 is a sectional view of same on the line 2 2 of Fig. 1. Fig. 3 isasectional view on the line 3 3 of Fig. 2. Fig. 4 is a sectional viewsimilar to Fig. 3, showing a slightly-modified form of construction.

The said device consists of a block A, provided in its lower face-with alongitudinal recess B, in which a practically semicircular clamping-armC is pivotallysecured by means of a transverse pin D. Avertically-disposed set-screw E is mounted in said blockA above saidrecess B and enters the latter to bear upon the arm C adjacent the pivotthereof to turn said arm in one direction. A flat spring F is secured toone end of said block A above the recess B and extends downwardly andrearwardly, its free end bearing upon the lower face of said arm 0 belowthe bearing-point of said set-screw E thereon and serves to hold saidarm in contact with the latter. At each side of said block A is aproject-ion or car Gr, in which a set-screw H is mounted, which isadapted to bear upon a projection I ofa practically semicircular arm J,pivotally mounted insaid block A. Each of said arms J is provided in itsend with-an annular groove K,which is adapted to be entered and engagedby the end of a longitudi nally-disposed screw L, entering the recessesor sockets M, in which said arms J are pivoted. All of said arms 0 and Jare tapered toward their free ends, the arm 0 being bifurcated at itsfree end and the arms J bent at their free ends to extend upwardly at anincline and their extreme ends also bifurcated to produce sharp pointsto obtain a good hold upon the tooth, all of said arms converging towardeach other at their free ends and lying in a substantially horizontalplane parallel with the bottom of the block A.

In Fig. 4 is illustrated a modified form of construction in which thespring F is omitted, and in place thereof the said arm C is providedwith a longitudinal slot N, enlarged at one end, through which theextended reduced shank O of the set-screw E passes, said shank 0 beingprovided at its free end with a head P, adapted to engage the lower faceof the arm 0 on each side of said slot N, so that by means of saidset-screw the arm C is raised and lowered.

In use our device is readily adjusted to firmly engage the tooth byoperating the setscrews E and H in an obvious manner, the arms J beingonly very slightly adjusted and the main adjustmentbeing effected bymeans of said arm 0.

. We claim as our invention- 1.- A dentists clamp comprising a body,three arms pivotally mounted thereon and converging toward each other-attheir free ends, and set-screws mounted in said body and engaging saidarms to turn each of the latter in one direction.

2. 'A dentists clamp, comprising a body, a recess therein, an armpivotally mounted in said recess, a socket in each side of said body, anarm pivoted in each of said sockets, and set-screws mounted in said bodyand engaging said arms to control the movements thereof in onedirection, the said arms converging toward each other at their freeends.

3. A dentists clamp, comprising a body, a recess therein, an armpivotally mounted in said recess, a socket in each side of saidbodyparallel with the pivot of said arm, arms pivotally mounted in saidsockets, projections on said arms, ears on said body adjacent saidsockets, set-screws in said ears adapted to bear upon the projections onsaid arms to control the movements of said arms in one direction, and aset -screw engaging said firstnamed arm to control the movementsthereof.

4. A dentists clamp comprising a body, a plurality of arms pivotallymounted thereon and having parallel axes, and set-screws controlling themovements of said arms, said arms converging toward each other at theirfree ends.

5. A dentists clamp, comprising a body, a recess in the lower face ofsame, an arm pivotally mounted in said recess, sockets in the side Wallsof said block, arms pivotally mounted in said sockets, annular groovesin the ends of said arms within said sockets, transversely disposed setscrews entering said VICTOR MALIZAN. JERRY G. PROCHASKA.

Witnesses:

RUDOLPH WM. Lo'rz, ERWIN J .LOTZ.

